mss

/M EH1 S/
noun
  1. 1

    A book, composition or any other document, written by hand (or manually typewritten), not mechanically reproduced.

  2. 2

    A single, original copy of a book, article, composition etc, written by hand or even printed, submitted as original for (copy-editing and) reproductive publication.

Source: https://en.wiktionary.org/wiki/manuscript, https://en.wiktionary.org/wiki/ms, https://en.wiktionary.org/wiki/mss